Definition of countermark in English:

countermark

noun

  • 1An additional mark placed on something already marked, especially for increased security.

    • ‘Any earlier coins that show a countermark do not indicate a date when later coins were countermarked.’
    • ‘On the other hand, the obverse countermarks show a rather careless placement on the imperial portrait.’
    • ‘Beside the countermark, this copy is easily distinguished because of the casting marks on the obverse.’
    • ‘At our last meeting Richard Baker gave another in his series of talks on countermarks or stamps.’
    • ‘These countermarks could have been stamped in about 36 C.E, the period when Pilate left his official post.’
    1. 1.1 A second watermark.
      • ‘The countermark in the paper of the drypoint The Forge 1871 belongs to the firm De Erven de Blauw c.1822.’
      • ‘Such watermarks are common in papers of the eighteenth and early nineteenth centuries, and they often have a countermark giving the manufacturer's name and/or date.’

Pronunciation:

countermark

/ˈkaʊntəmɑːk/